Paradoxical side effects of green advertising: how purchasing green products may instigate licensing effects for consumers with a weak environmental identity

Research into green advertising has mainly investigated how green appeals can enhance product attitudes, sales, and brand image. But what happens after people have purchased a ‘green’ product advertised in a green ad? In two experiments, we show that purchasing a green product may have paradoxical post-purchase effects, such that it may lower intentions to engage in subsequent environmentally friendly behaviour (a so-called licensing effect). Importantly, our results show that these post-purchase effects are moderated by environmental identity: only people with a weak environmental identity show these paradoxical post-purchase licensing effects, people with a strong environmental identity are more likely to continue behaving in an environmentally friendly way.